When Katy Perry went to support fellow pop-star Miley Cyrus at her LA 'Bangerz' concert, she got quite a surprise.

The two singers' shared a kiss during Cyrus' performance of 'Adore You,' but Perry wasn't expecting so much tongue!

On Tuesday (March 4th), the 29 year-old appeared on Australian talk-show 'Sunrise' to promote her upcoming world tour, and it didn't take long for the host to ask her about the smooch.

"I just walked up to her to give her like a friendly girly kiss, you know, as girls do," Perry explained, adding, "and then she like tried to move her head and go deeper and I pulled away."

"God knows where that tongue has been," she jokingly quipped. "We don't know! That tongue is so infamous!"

"I just kissed a girl and I liked it," Miley said to the LA crowd after the impromptu moment.

The 'We Can't Stop' singer was not only unfazed by the kiss, but she almost seemed proud of it, after posting an action shot of PDA moment on Twitter, along with several kissing emoji icons.

Perry finally spoke about her 'Prismatic Work Tour', which starts on May 7th in Ireland, and discussed getting in shape for a very buy and gruelling schedule.

"Yeah, it's a lot of work, I have to be very focused," she admitted. "Right now I've cut out all alcohol, all fatty foods, a lot of dairy. I go home and I'm going to have like mostly vegetarian, with some protein on the side like chicken."

She further said, "I'm almost 30 guys, my body does not snap back anymore!"